Implement two new policies to control muting the audio I/O.

chrome/common/pref_names.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/pref_names.h"
 
 #include "base/basictypes.h"
 
 namespace prefs {
 
@@ skipping 1750 matching lines @@
 const char kDeviceLocation[] = "device_status.location";
 
 // A string that is used to store first-time sync startup after once sync is
 // disabled. This will be refreshed every sign-in.
 const char kSyncSpareBootstrapToken[] = "sync.spare_bootstrap_token";
 
 // A pref holding the value of the policy used to disable mounting of external
 // storage for the user.
 const char kExternalStorageDisabled[] = "hardware.external_storage_disabled";
 
+// A pref holding the value of the policy used to disable playing audio on
+// ChromeOS devices.
+const char kAudioOutputEnabled[] = "hardware.audio_output_enabled";
+
+// A pref holding the value of the policy used to disable capturing audio on
+// ChromeOS devices.
+const char kAudioCaptureEnabled[] = "hardware.audio_capture_enabled";
+
 // A dictionary that maps usernames to wallpaper properties.
 const char kUsersWallpaperInfo[] = "user_wallpaper_info";
 #endif
 
 // Whether there is a Flash version installed that supports clearing LSO data.
 const char kClearPluginLSODataEnabled[] = "browser.clear_lso_data_enabled";
 
 // Whether we should show Pepper Flash-specific settings.
 const char kPepperFlashSettingsEnabled[] =
     "browser.pepper_flash_settings_enabled";
@@ skipping 208 matching lines @@
 
 // Counts how many more times the 'profile on a network share' warning should be
 // shown to the user before the next silence period.
 const char kNetworkProfileWarningsLeft[] = "network_profile.warnings_left";
 // Tracks the time of the last shown warning. Used to reset
 // |network_profile.warnings_left| after a silence period.
 const char kNetworkProfileLastWarningTime[] =
     "network_profile.last_warning_time";
 
 }  // namespace prefs